Spring-dolly.



PATENTED SEPT. 11, 1906.

E. GAGB. SPRING DOLLY. APPLIOATION PILED AUG.10,' 1905 i tive view ofthe holding-bar. larged perspective view EDWARD GAGE, OF CHICAGO,ILLINOIS.

SPRING-DOLLY.

Speeificaton of Letters'Patent.

Patented Sept. 11, 1906.

Application filed August 10, 1905. Serial No. 273,(353.

To all whom it may concern:

Be it known that I, EDWARD GAGE, a citizen of the United States,residing at No. 15 Aberdeen street, Chicago, in the county of Cook andState of Illinois, have invented a new and useful Improvement inSpring-Dollies, of which the following is a specification.

This invention relates to a spring-dolly; and the object of theinvention is a device whichwill hold a rivet while the rivet is ber ingdriven by a pneumatic hammer and which is provided with a spring-cushionfor the purpose of permitting a limited movement of the holding-bar andalso to take up the force of the hammer-blow.

The invention consists of the novel features of construction hereinafterfully described, pointed out in the claim, and shown in the accompanyingdrawings, in which- Figure 1 is a vertical elevation showing my devicein use, a in section. Fig. 2is a vertical section through my dolly, theparts being shown in elevation, Fig. 3 is a transverse section on theline 3 3 of Fig. 2. Fig. 4 is a detail perspective view of a screw-rod.Fig. 5 is a detail perspective view of a cylinder. Fig. 6 is a detailperspec- Fig. 7 is an enof the holding-pin.

In the drawings, A represents a cylindrical casing open at the upper endand partially closed at the lower end; the lower end being provided witha central aperture A' and a slot A being formed in the side of thecylinder near its upper end.

A threaded' rod B is provided with parallel ears B' at its lower end,and between the said ears is pivoted an end portion of a compound leverC, and the pivoted end portion or head is formed with a steel-temperedbiting point or tooth C'. The screw-rod B works in the aperture A',which is threaded and projects upwardly into the cylinder A. Acoil-spring D is arranged in the cylinder A and encircles the portion ofthe rod B within the cylinder and also extends upwardly above the upperbeam being shown partly r end' of said threaded rod. To prevent thespring from injuring the threads upon the rod,

a sleeve E is also placed in the cylinder and within the coil-spring Dand incloses loosely the portion of the rod B within the cylinder.

A snap or holding bar F slides in the cylinder A, and its lower endbears upon the spring D. The upper end of the snap-bar is slightlyconcaved, as shown at F', to fit the head of a rivet. To lock thesnap-bar in the cylinder A, I provide a split spring-key G, which key ispassed through the slot A of the cylinder, and its split end portionsengage an aperture F in the snap-bar F.

The manner of using the device will be obvious, and it will also'beclear that the device can be used with structure-beams, such as shown atH in Fig. 1, of various sizes, as the height of the dolly can beincreased or diminished by screwing the rod B outwardly or inwardly withrespect to the cylinder A, so that the device can be used with beamshaving their upper and lower flanges at different distances apart.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

A device of the kind described comprising a casing open at its upper endand having a threaded aperture at its lower end and a longitudinal slotin the side, athreaded rod working through the threaded aperture, alever having a pointed end, pivotally connected to the threaded rod, asleeve within the casing So inclosing the threaded rod, a coil-springsurrounding and eXtending above the sleeve, a snap-bar projectingfromthe upper end of the casing and having its lower end resting upon thespring, said barbeing apertured to aline with the slot of the casing,and a key passing through said slot and fitting in the aperture.

EDWARD GAGE.

Witnesses:

HUGH MCINTYRE, GEO. Bnrrs.

